| 摘要 |
PROBLEM TO BE SOLVED: To ensure the polishing of the top and tail edges of books without any problem, even regarding the books of such kind that the polishing of their covers is not desired or is impossible because the covers are in the way. SOLUTION: A book clamping mechanism 8 which reciprocates on a polishing drum with a clamped book 7 is provided and the frame 9 of the book clamping mechanism 8 is of a planar square shape and constituted of a forward end plate 10, a rear end plate 11 and side plates 12 and 13 on both sides. A clamping plate 14 is arranged in the frame 9 and driven by a clamp cylinder 15. In addition, a gap G1 for the cover from which two lapped pieces of a hard cover 7a are drawn, is formed between one end part of the clamping plate 14 and the side plate 13. Thus it is possible to polish only the book body by clamping it when the book 7 is clamped between the clamping plate 14 and the forward end pate 10.
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